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Question:

how many plastic tubes could i 3D print, with one spool?

If I have a 2lb spool of 1.75mm ABS filament, how many 5.25 inch x 2.25 inch (both dimensions are diameters) hollow cylinders with 3 mm thick walls could i print with one spool?

Answer:

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First determine the volume of filament you have: density of ABS =~0.038 lb/in^3 2lb / .038 = 52.6in^3 of material Second, determine the volume of each tube: inner diameter of tube = 5.25in-3mm=5.132in (both of your dimensions cannot be diameters, so I assumed the second was the height, if it's a tubular cone then the height is missing) volume of each tube: = 2.165in^3 per online calculator below. You could double check by calculating the volume of cylinders with the outer and inner diameters separately and then subtracting the results. 52.6 / 2.165=24.3 so you could print approximately 24 tubes

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